Bending roll



IWI/JM@ M f 2 Sheets-Sheet l A. T. YATES A BENDING ROLL Filed Nov. 29,1950 July 19, 1932.

A. T. YATES BENDING ROLL July 19,l 1932.

2 Sheets-Sheet 2 Filed Nov. 29, 1950 Patented `Iuly 19, 1932 gJNI'I'EDSTATES PATENT OFFICE ARTHUR T. 'YATES, OF WEST SENECA, NEW YORK,ASSIGNOR TO BUFFALO FORGE COM- PANY, OF BUFFALO, NEW YORK lo' ofimproved construction for readily adjust- BENDING ROLL This inventionrelates to rolls of the type used in connection with bending machines.

The objects of this invention are to provide rolls for bending machineswhich comprise a number of parts adjustable relatively to each otherlengthwise of the axes of the rolls to adapt the rolls for use inconnection with work of different cross sectional shapes; also toprovide rolls of this kind with means ing the several parts of the rollsrelatively to each other; also to provide a bending machine of this kindin which one of the rolls may be arranged to rotate about its shaft tocurvature of the inner and outer faces `of the work which is beingrolled; also to provide rolls of this kind with mechanism of improvedconstruction for adjust-ing the parts of the rolls relatively to eachother; also to improve the construction of rolls of this kind in otherrespects hereinafter specified.

In the accompanying drawings:

Fig. 1 is a fragmentary elevation of a bending machine provided withrolls embodying this invention;

Fig. 2 is a fragmentary cross sectional view thereof; approximately online 2 2, Fig. 1, on an enlarged scale, showing the rolls operating on adifferent piece of work than that shown in Fig. 1;

Fig. 3 is a fragmentary section thereof, on line 3 3; Fig. 1, on a stilllarger scale;

Fig. 4 is a sectional View thereof similar to Fig. 2; but showing adierent adjustment of the parts of the rolls to enable the rolls to beused for bending flat bars latwise;

Fig. 5 is a similar fragmentary section, showing the rolls adjusted forbending an angle bar with its radial flange extending from the otherflange in a direction away from the axis of curvature;

Fig. 6 is a similar fragmentary view, showing the rolls adjusted forrolling an angle bar with its radial flange extending from the otherflange in a direction toward the axis of curvature;

Fig. 7 is a fragmentary section thereof, on line 7 7, Fig. 2:

Serial No. 498,996.

Fig. 8 is a similar section taken on line 8 8, Fig. et;

Fig. 9 is a section thereof on line 9 9, Fig. 2.

Fig. 1 illustrates this invention as applied to a bending machine, inwhich the three roll shafts are arranged horizontally, but it will beunderstood that it is not intended to limit this invention to this typeof bending machine, since the rolls embodying this invention are equallyapplicable to bending machines in which the roll shafts extend in anyother direction. In the particular machine illustrated in Fig. 1, Arepresents the frame of the machine and B, C and D the three bendingrolls. The bending machine shown is also provided with the usual guiderolls E for preventing twisting of the work. This particular invention,however, relates only to the construction of the three bending rolls ofthe machine, and the roll B will hereinafter be referred to as the innerroll, since it is nearer to the adix of curvature, about which the workis bent; and the rolls C and D will be referred to as the outer rolls.

The inner roll B is mounted upon a shaft 10 and the two outer rolls areeach mounted on a shaft 11. Since the two outer rolls are identical inconstruction; only one of them will be hereinafter described. The rollsshown are constructed so as to bend flat strips both flatwise andedgewise and to bend angle bars either with a fiange extending inwardlytoward the center of curvature, or with a flange extending outwardly. Itwill be understood, however; that it is not intended to limit thisinvention to rolling the particular shapes shown in the drawings7 sinceobviously the rolls could be used to roll material of other crosssectional shapes without departing from the scope of this invention.

In the particular construction shown; the inner roll includes asubstantially cylindrical outer sleeve or part 14, which is locatednearest to the outer end of the shaft 10, and an intermediate sleevepart of the same outside diameter as the sleeve 14 and provided on itsinner face with an annular recessed portion 16. The roll also includes aring shaped inner part 17; the outer periphery of which is preferably ofthe same diameter as for example, bymeans of screws or studs 33 thatofthe parts 14 and 15 and the inner portion of which has an extension 18adapted to enter into the recess 16 of the intermediate roll part 15. Byadjusting these three sleeves lor rings relatively to each other, theinner roll B can be adapted to cooperate with work of different crosssectional shapes.v

Y The outer rolls C and D are-also each pro-k vided with three separatesleeveor ring parts, the outer part 2O being the 5 largest of the threeand havingon its inner face an under-j-` cut annular recess 21 into andout of which an intermediate part or member22 ofthe roll as the part20.y Preferably, the roll part 23 has a slight projection 24 near theinner portion thereofwhich is adapted to enter into a correspondingIgroove in the'roll member 22.Y In each of the rolls, the inner parts'17and 23 arenotadjustable and are preferably frictionally orV otherwiseheld against move-l ment lengthwise of the roll shafts. The `outer andintermediate parts of the rolls are ad'-v -j'ustable lengthwise of theroll shafts toadapt the rolls for the various shapes on whichthey are tooperate. rThe several parts of each bending roll C and I) may be lheldagainst rotation about their respective roll shafts 11 in any suitable-or desired manner, for eX- am'ple,in the case Lof the outer rolls, by akey 25 iitting in lreyways formed inthe roll shaft and parts in eachouter roll. rlhe'parts' 14,

15 and k1-7 of Vthe inner roll may be held' against turning` relatively'to the shaft 10 by means of ay lrey'27 shown in Figs-j4, 5 and 8'. An'eyebolt '28fmay 'be screwed into the end offthis key to facilitateremoving of the same, if desired. n l Y .j j

Thefmeans for adjusting the outer and inter'mediate parts of the rollstoward and from the inner parts 'and each other, 'and for Y holding thelparts in adjusted positions during A`theuse of the machine maybe kofany suitable or desired construction, the vparticular `adjusting' meansshown in the drawings 'being merely'an'example of one form of such meansusable in 'connection with my invention, i Since the adjusting means forall Vof the'three rolls shown is'substantiallythe same, one descriptionapplies to all of the three adjusting mechanisms. .Y y

The 'out-er parts 14'a'nd 2O Vrof the rolls are preferably'adjustedlengthwise of their roll shafts by adjusting means connecting each ofthese parts with the roll-shaft on which it 'isinounted `'In theconstruction shown for 'thispu'r'posa the end of each'roll shaft is pro-'Avided'witlh a'threaded hole 30 in which a correspondingly threadedstud` j 31 engages. Upon turning this stud, Athe lengthwise nieveinentofthe. stud is imparted to a plate or member 32 'which is suitablysecured to the outer part of Vits rollin any suitable manner,

(Fig. 1) passing through holes in these plates and engaging threadedholes in the outer roll part. In order to impart lengthwise movement tothe outer part of a roll when the stud 31 is turned, a suitableconnection is formed between the plate 32 and the stud 31, whichconnection may, for example, include an integral flange 34 on thelstud31 and a pair of nuts or threaded collars 36 and 37. VAs shown in theVdrawings, an integral collar 34 engages the ginner face of theconnecting member or plate 32 and the nut 36 engages the outer face, thenut 37 acting asa lock nut to hold the nut 36 in the desired position,so as to permit free rotation of the stud 3l relatively to theconnecting member l32. To facilitate turning yof the' stud 31, the endfof the stud may be provided withl a part'38 which may be engaged by awrench ,orvother tool for turning the (stud. After-the desiredadjustment of the outer roll part has been effected,- 'the stud can beul-oclred against turning by turning the nut 36 in a direction toclampthe stud tothe connecting member or plate 32, and the nut 37 may beused as afloclr nut in lthe usual manner." By' means of thisconstruction, it will beobvious'y that by turning the lstud 31 in eitherdirection, the connecting plate or member 32 will be moved. toward orfrom the end of the. roll shaft, carryingvwith it the outer part'oftheroll, but any other means for adjusting the outeriroll part relativelyto' the shaftV and for holding this part in its adjusted position' maybe provided.

' The intermediate part of each roll, which isthe part 15 of theinnerroll or the 'part 22 of an outer roll, may also be adjustedlengthwise of its shaft or of the outermost roll part in any suitablemanner. In the construction shown, these adjusting means are mounted onthe outermost roll part or on the connecting plate or member 32 securedto the outermost roll part and, therefore, forming a part thereof; yF orthis purpose, va plurality of rods 40 are provided, which extend throughholes lengthwise offthe outer roll part, the inner ends -o'f the rodsbeing rigidly secured to the intermediate' roll parts. VIn the innerroll three-of these rods 40 are provided, and in each of the outer rollsfour of these rods are shown.` Any desired number, however, may be usedin either roll.Vv Ihe outer portions Vof these 'rods Vare threaded, andthe threads of the rods 40 engage corresponding internal threads inadjusting sleeves 42 which are j ournalled to yturn in holes orlbearings in the connecting plate 32, but are held against movementlengthwisecf these Yholes' or bearings. i For this purpose, each sleeve42 has an externa-l thread near the inner end thereof,and has a rnut 43rigidly secured and held against turningI on this threaded part, whichmay 'for that reason be Ymade tapering, as

clearly shown in F ig. 3. rl`he other end ofthe Y sleeve is enlarged,and in the construction shown, is provided with a sprocket wheel 44.Consequently, the sleeves 42 are free to turn in the connecting plates32, but are held against lengthwise movement therein by the nut 43 andthe enlarged end or sprocket wheel 44. It will be obvious that byturning the nuts or adjusting sleeves 42, the intermediate part of theroll will be moved toward or from the adjusting plate through the mediumof the rods 40.

The construction described makes it necessary to adjust all of theadjusting sleeves 42 t0 the same extent, to prevent binding of theintermediateroll part on its shaft, and for this reason, all of thesprocket wheels 44 are connected by means of a sprocket chain 45 so thatupon turning one of the adjusting sleeves 42, the same amount of turningmotion will be transmitted to each of the other sleeves. This turningmay be effected in any suitable manner, and for this purpose, eachadjusting nut or sleeve may be provided beyond the sprocket wheel 44with a head 46 which may be engaged by a wrench for turning the same.

By means of the construction described, it will be evident that when theparts are adjusted from the positions shown in Fig. 2 to thepositionsshown in Fig. 4, it will be necessary first to turn the adjustingsleeves 42 of the outer rolls C and D to draw the intermediate members22 completely into the recesses 21 of the outer roll part 20. When thishas been done, the studs 31 of all three roll shafts may be turned tomove the clamping plates 32 toward the ends of the roll shafts until theouter and intermediate parts have been moved into the positions shown inFig. 4. To make the corresponding change in the inner roll, it is onlynecessary to turn the stud 31 to move the outer and intermediate rollparts 14 and 15 into close-fitting relation to the roll part 17. f

When it is desired to move the parts from the positions shown in Fig. 4,into the positions shown in Fig. 5, the studs of the two outer or lowerrolls C and D are turned in the opposite direction to move theconnecting plates 32 away from the ends of the roll shafts 11. When itis desired to adjust the parts Vof the inner or upper roll B to theposition shown in Fig. 6, the stud 31 is iirst turned to move theconnecting plate 32 away from the end of the roll shaft 10, and theadjusting sleeves 42 are then turned to move ythe intermediate roll part15 away from the outer roll part 14.v Y

It will thus be seenthat by means of the adjusting means described, anydesired adjustment ofthe intermediate and outer roll parts relatively tothe inner roll part may be obtained. Consequently, when the parts areadjusted to the position shown in Fig. 2, a flat bar W may be passedthrough the rolls to bend the same edgewise into the desired curvature,the inner edge of the bar entering into a groove or recess formedbetween the intermediate and inner roll parts 15 and 17 of the innerroll B and the outer edge of the bar Vil entering between the roll parts2O and 23 and bearing on the intermediate roll part 22, which in thatcase is arranged at the base of the slot or groove between the rollparts 2O and 23. l/Vhen it is desired to bend a substantially flat bar Xflatwise, the various parts of the rolls are placed closely together, asshown in Fig. 4, so that the several roll parts cooperate to form rollswith substantially uninterrupted, smooth, cylindrical surfaces. When itis desired to roll an angle bar Y, Fig. 5, with one leg extendingradially outwardly from the center of curvature and from the other orcylindrical leg, the parts of the roll B may be left in the positionshown in Fig. 4 to form flat bearing surface for the cylindrical flangeof the bar Y, and the parts 20.and 22 of the rolls C and D are movedoutwardly to form a space between these parts and the inner roll parts23 into which the outwardly extending leg of the angle bar may extendduring the process of bending.

Vhen the machine is used for bending an angle bar Z with one of its legsextending inwardly toward the radius of curvature from the other leg,the arrangement illustrated in Fig. 6 is employed, in which the parts ofthe outer rolls C and D are secured closely together, as shown in Fig.4, and the parts of the inner roll B are so spaced that the two parts 15and 17 are close together and a gap is formed between the parts 14 d E5into which the inwardly extending of the angle bar may extend` When therolls are employed for bending` a bar in such a manner that there is aconsiderable difference between the radii of curvature of the inner faceof the work engaging the roll B and the outer face of the work engagingthe other two rolls, since all of the rolls are positively driven at thesame peripheral speed, it will be obvious that a considerable amount ofslipping will result. This slipping is very objectionable in that itsets up severe vibrations in the machine. In order to avoid thisdifficulty, means are provided for having the inner roll B act as anidler roll. For this purpose, in the construction shown, means areprovided for readily disconnecting the three parts of the inner roll Bfrom its shaft 10 and in this construction, there is also provided abearing sleeve 50 between the shaft 10 and the several parts of theinner roll B. This sleeve is split to permit the key 27 to exten dthrough the same and into keyways in the shaft 10 and in the parts ofthe inner roll B. lVhen it is desired to rotate the inner roll B aboutits driving shaft, the key 27 may be removed llO and a half key 5linserted, as shownin Figs.v l, 2 and 7 This key is arranged in thekeyway in the roll shaft l0 and extendsinto the split part of thebearing sleeve 50 and holds the same against rotation relatively to theshaft l0. The key, however, does not extend into the keywaysin the partsof the inner roll B, and consequently, these parts of the roll can turnrelatively to the shaft 10. Consequently, referring to Fig. 2, it willbe seen that since the radius of curvature of the inner face of the barl/V is considerably less than. the radius of the outer face of this barengaging the rolls Cv and C, the roll B will turn at a slower rate ofspeed than the other two rolls, so that the parts ofthe roll B will turnrelatively to the bearing sleeve 50. If desired, the half key may alsobe employed when rolling the flat bar X flatwise, providing thethickness of the bar is greatenough to warrant the use of an idle roll.When rolling angles, the bending pressure is exerted only on the flatfaces of a leg arranged between the rolls so that the disconnection ofthe roll B from its driving shaft is not necessary, and also notdesirable, since the additional driving force of the innervroll B isnecessary to e'ect the bending of angle bars or similar shapes' In orderto prevent the rotation of the roll aboutthe shaft from turning the stud31, antifriction fiber washers or similar means 52 and 53 may beemployed between the plate 32 and the flange 34 ofthe stud and the nut36 respectively. The washers will not interfere with the locking of thestud in fixed position by the use of the lock nuts. Obviously, when theroll VB isdisconnected from its shaft, the nuts 36 and 37 are backedaway from th-e plate 32 sufficient to permit this plate to turnrelatively to the stud 31.

l The arrangement of the parts in such aV manner that the adjustingmeans for the in-V termediate roll part are mounted on the connesting.plate 32, forms a connection between the outer and intermediate rollparts,so that the'removal of the outer and intermediate Y roll partsfrom their shafts can be very readily eflected by merely turning the'studBl Vto entirely disen gage the same from the threaded hole 30,whereupon these roll' parts are removed as a unit. l

While the invention has been described as applied to rolls for bendingflat barsA and angle bars, it will be obvious thatwith slight changes1in the shape of the roll parts, the rolls can be adapted for bendingwork of other shapes. I claim as my invention: v Y Y l. A composite rollfor a bending machine,

i said roll being'divided lengthwise ofthe aXis v thereof intoagplurality o f roll parts, at least -i twoof said parts beingadjustable lengthwise ofthe roll relatively to another part andto ingwidths', at leastone of said roll part-s hav ing'width, at least one' oflsaid roll parts havj ing a portion of smaller diameterthan therolldiameter and extending into an annular recess of-an adjacent rolland movable out of said recessto kform a bottomV for one of said y rollshaft and the other parts being adjustable lengthwise of said roll shaftrelatively to said liXed-part and toeach other, said roll parts, whenarranged closely togethenforming a roll with a single substantiallyunbroken cylindrical surface.

3. A roll for a bending machine, includ-- ing at least three annularparts mounted on a roll shaft, one of said parts beingffiXed to saidroll shaft and the other parts being adj ustable lengthwise of said rollshaft relatively to said fixed part land to each other, and meansforming a Y connection between said shaft andsaid adjustable partsforelfecting adjustmentthereof. v

l. A roll for a bendingfmachine, including at least three annular partsmounted on a roll shaft, one -of said parts beingfixed'to said rollshaft 'andthe other parts being adjustable lengthwise of said roll shaftrelatively to said fixed-'part and to each other, and means mounted onsaid roll shaft and extending beyondA lthe end thereof .and connectedwith said ladjustable parts for adjusting-the same. f

5; Aroll ing a plurality of annular parts mounted on a. roll shaft, oneof said parts being fixed to said rroll shaft and the otherparts beingadj ustable lengthwise of said rolll shaftrelatively to said fiXedpartand to each other, a mem- 3l;

for a bending machine, includ- 'iii-:s

ber adjustablymounted on the end of said i shaft and connected with oneof. said adjustablerollparts, and means mounted on said member andconnected with the other adjustable rollpart to effect adjustmentthereof relatively to the other parts of said roll;k Y

6. Aroll for a bending machine, including a plurality of annular partsarranged successively lengthwise of a roll shaft, some of said rollparts being adjustable lengthwise of the roll shaft to enablefthe rollparts to be moved together toform a substantially continuous cylindricalsurface and to be separated to form Yannular grooves of varying widthsto receive portions ofthe work which 11i-i is being (bent, at leastoneof said roll parts havinga portionyof smaller diameter than the rolldiameter to form a bottom for at least one of-said'gr'ooves.- 1 Y 7. Aroll for a bendingjmachine, including a' plurality of annular partsarranged successively lengthwise of-a roll shaft, an adj ustableconnection between the outermost of said roll'parts and Y.thevrr'ill'shaft for adjusting said outermost part relatively to the otherroll parts, and means mounted on said outermost roll part and connectedwith another roll part for adjusting said other roll part.

8. A roll for a bending machine, including a plurality of annular partsarranged successively lengthwise of a roll shaft, the innermost of saidroll parts being mounted in fixed relation to the roll shaft, meansconnecting the end of the roll shaft and the outermost roll part foradjusting the outermost roll part lengthwise of the shaft, and meansmovable with said outermost part and connected to an intermediate partfor adjusting` said intermediate part relatively to said outermcst partand said inner part.

9. A roll for a bending machine, including a plurality of annular partsarranged successively lengthwise of roll shaft, a threaded stud engagingthe end of the roll shaft and connected with the outermost of said rollparts for adjusting the same lengthwise of said shaft, and means mountedon said outermost roll part for effectinfr adjust-ment of anintermediate roll part.

10. A roll for a bending machine, including a plurality of annular partsarranged successively lengthwise of a roll shaft, a mem- -her secured tothe outermost of said roll parts and extending crosswise of the end ofthe sha-ft, adjusting means connecting the end of the shaft and saidmember for eecting adjustment of said outermost roll part lengthwise ofthe shaft, means for adjusting an intermediate roll part lengthwise ofsaid shaft, including rods connected with said intermediate roll partand extending through said outermost roll part, and means located at theouter end of said outermost roll part for effecting adjust-mentof saidintermediate roll part through the medium of said rods.

11. A roll for a bending machine, including a plurality of annular partsarranged successively lengthwise of a roll shaft, means connecting theoutermost roll part and said shaft -for adjusting said outermost rollpart lengthwise of said shaft, rods secured to an intermediate roll partand extending lengthwise through said outermost roll part, means locatedat the outer end of said outermost roll part for effecting adjustment ofsaid intermediate roll part Ythrough said rods, and

means connecting said adjusting means to effect a simultaneousadjustment of all of said adjusting means acting on said rods.

12. A roll for a bending machine, including a plurality of annular partsarranged successively lengthwise of a roll shaft, a member secured tothe outermost of said roll part-s and extending crosswise of the end ofthe shaft, adjusting means connecting the end of the shaft and' saidmember for effecting adjustment of said outermost roll part lengthwiseof the shaft, rods secured to an intermediate roll part and extendingthrough said outer rollpart and threaded near their outer ends,internally threaded sleeves engaging said threaded part and held againstendwise movement relatively to said outermost roll part, sprocket wheelson said sleeves, and a sprocket chain connecting said sprocket wheels,whereby adjustment of one of said sleeves to adjust said intermediatepart results in simultaneous adjusting of all of said sleeves.

13. A bending machine having three rolls, two of which are arranged tobear against the portion of the work of greater radius of curvature andthe third of which hears against the portion of the work of lesserradius of curvature, driven shafts on which said rolls are mounted,means for locking said rolls to their shafts to turn therewith, and abearing bushing arranged between said third roll and its shaft and aboutwhich said roll may turn when unlocked from its shaft.

14:. A bending machine having three rolls, two of which are arranged tobear against the portion of the work of greater radius of curvature andthe third of which bears against the portion of the Work of lesserradius of curvature, driven shafts on which said rolls are mounted, keysfor securing said rolls to said shafts and fitting into keyways in saidshafts and rolls, and a bearing bushing arranged between said third rolland its shaft and slit to permit passage of a key therethrough, saidthird roll rotating about said bushing when the key connect-ing the samewith its shaft is withdrawn.

15. A bending machine having three rolls, two of which are arranged tobear against the portion of the work of greater radius of curvature andthe third of which bears against the portion of the work of lesserradius of curvature, driven shafts on which said rolls are mounted, keysfor securing said rolls to said shafts and fitting into keyways in saidshafts and rolls, a bearing bushing arranged between said third roll andits shaft and slitto permit passage of a key therethrough, said thirdroll rotating about said bushing when the key connecting the same withits shaft is withdrawn, and means for securing said bushing againstturning about its shaft when said kev is withdrawn.

16. A bending machine having three rolls, two of which are arranged tobear against the portion of the work of greater radius of curvature andthe third of which bears against the portion of the work of lesserradius of curvature, driven shafts on which said rolls are mounted.,kevs for securing said rolls to said shafts and fitting into keyways insaid shafts and rolls` a bearing bushing arrangedl between said thirdroll and its shaft and slit to permit passage of a key therethrough,said third roll rotating about said bushing when the key connecting thesame :v'nhg'tsV shaft sV Withdrawn, and ahalf key, -extendng onlyntowthe keyway of the shaft of. said ,third Y1011 andlnto said sltn saidbushing, to hold said bushing against turn- 35 ng'about its shaft Whilesaidthird roll re- .volves about said'bushillg. f y a ARTHUR T. AYATES.

